HTTP API: Add a WP_Http class constant for the HTTP status code 301.

Fixes #42490


git-svn-id: https://develop.svn.wordpress.org/trunk@42208 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-http.php

@@ -31,6 +31,7 @@ class WP_Http {
 	const HTTP_CONTINUE                   = 100;
 	const SWITCHING_PROTOCOLS             = 101;
 	const PROCESSING                      = 102;
+	const EARLY_HINTS                     = 103;
 
 	const OK                              = 200;
 	const CREATED                         = 201;